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A sample of an annotated bibliography entry for HCM402, using
the guidelines on page 11, and addressing at least one bullet per
section
Peter Pronovost, M.D., Ph.D., Dale Needham, M.D., Ph.D.,
Sean Berenholtz, M.D., David Sinopoli, M.P.H., M.B.A., Haitao
Chu, M.D., Ph.D., Sara Cosgrove, M.D., Bryan Sexton, Ph.D.,
Robert Hyzy, M.D., Robert Welsh, M.D., Gary Roth, M.D.,
Joseph Bander, M.D., John Kepros, M.D., and Christine
Goeschel, R.N., M.P.A. An Intervention to Decrease Catheter-
Related Bloodstream Infections in the ICU N Engl J Med
2006;355:2725-32.
This study is closely related to the previous literature, which is
cited. The review of earlier work is recent and complete as of
the time this article was written.
The problem statement is clear: Can catheter-related
bloodstream infections occurring in the intensive care unit
(ICU) be reduced using training protocols and checklists?
The hypothesis is clearly stated: catheter-related bloodstream
infections occurring in the intensive care unit (ICU) will be
reduced using training protocols and checklists.
Method: independent and dependent variables are clearly
stated, and are, respectively, the intervention of training
protocols/checklists, and the rates of catheter related
bloodstream infections.
The sample was 108 hospital ICUs in Michigan that agreed to
participate in the study, and of these, 103 reported data. The
analysis included 1981 ICU-months of data and 375,757
catheter-days. This sample should be representative of hospitals
in other states in the United States
Results and Discussion are related to the hypotheses. The
median
rate of catheter-related bloodstream infection per 1000 catheter-
days decreased
from 2.7 infections at baseline to 0 at 3 months after
implementation of the study
intervention (P≤0.002), and the mean rate per 1000 catheter-
days decreased from
7.7 at baseline to 1.4 at 16 to 18 months of follow-up
(P<0.002). The regression model
showed a significant decrease in infection rates from baseline,
with incidence-rate
ratios continuously decreasing from 0.62 (95% confidence
interval [CI], 0.47 to 0.81)
at 0 to 3 months after implementation of the intervention to 0.34
(95% CI, 0.23 to
0.50) at 16 to 18 months.
The list of references was current at the time the article was
written.
The report is clearly written and understandable.
Running head: ACUTE MYELOID LEUKEMIA: A CONCISE
REVIEW 1
ACUTE MYELOID LEUKEMIA: A CONCISE REVIEW 8Acute
Myeloid Leukemia
Ruth Ivy
HCM 402
July 14, 2019
Acute Myeloid Leukemia
The body is made up of million cells that undergo cell cycle
that allows them to grow then they divide and die. For you to be
able to understand the concept around this, you will need to
know about cancer whereby cells grow uncontrollably. In that
case, cells grow but they do not die like other normal cells. This
occurs by first damaging the DNA of the cells. Leukemia starts
in the organs that make up the blood, called the bone marrow.
Acute cancer will need to be treated before they are fatal.
Acute myeloid leukemia is a type of cancer that starts in the
blood cells inside the bone marrow. The blood stem cells that
are in the bone marrow produces new blood cells. In the
production, cells will develop and make the blood-forming cells
which develop to red blood cells. Lymphocytes are made from
the lymphoblast; these are the ones that are supposed to die
which do not happen when leukemia is involved. In the case of
leukemia, the lymphocytes do not die but reproduce and crowd
in the bone marrow.
The high number of lymphocytes makes the organ to be unable
to function normally. The blood vessel will become clogged and
the movement of blood will be hindered. The symptoms will
start showing from that point whereby one will have bone and
joint pain as cells build up there. The cancerous cells when in
the spleen and liver they will lead to abdominal swelling. When
some risk factors are prevented, they can help to mitigate
myeloid leukemia. The risk factors such as smoking, chemical
exposure and other many can cause leukemia. Some risk cannot
be controlled as one is born with.
There is also a diagnosis process that needs to be
understood when we look at the symptoms of the disorder. Once
you get diagnosed with the disorder, then you can be tested to
determine leukemia. The blood sample is the ones that are taken
to take the patient through testing. On the other hand, the
sample of bone marrow biopsy can also be taking and
aspiration. According to the American cancer society, the bone
marrow is supposed to have 20% blast for it to be diagnosed.
The shortage of red blood cells and the platelets indicates the
presence of leukemia. When you are doing the cells, the
cytochemistry is applied where cells are dyed with a stain. The
leukemia cells react with the stains.
There are treatments of AML which are based on the patient.
The main treatment is chemotherapy. You can be injected with
anti-cancer pills and the doctor may insert a catheter into the
vein. This is when the patient is under anesthesia. These
approaches relieve the pain and chemotherapy can start. There
are stages that are involved, remission induction and followed
by consolidation. The drugs that are used have many side
effects since they invade the dividing cells very rapidly. These
affect the hair roots and that is why patients have a loss of hair.
The patients always have to be on a good diet since you will be
on constant medication and pills. To make sure you are strong
food is very important. However, despite all the treatments and
the countermeasure taken, many people succumb to leukemia.
most of the death from AML are adult. The doctors are hoping
to do a lot so that they can be in a position to help people.
When someone is diagnosed, you will have to go through some
hard and painful life. When the treatments are done then the
patient can live a normal life thereafter. There is nothing that
the doctors can do in preventing the gene since you are born
with them.
We can conclude that AML is very complex and the knowledge
in biology can help us to discover new potential drugs that can
help us to deal with the disorder. It is a fact that you cannot win
through a single approach to the drug option. Relapse can be
termed to be the highest cause of the cases of mortality after
HCT. On the other hand, immunotherapy is the other approach
that helps to provide a long-lasting cure for AML patients.
https://www.medicalnewstoday.com/articles/323444.php
https://ascopubs.org/doi/full/10.1200/JCO.2008.16.0333
https://journals.lww.com/co-
hematology/Abstract/2007/03000/Influence_of_new_molecular_
prognostic_markers_in.5.aspx
Influence of new molecular prognostic markers in patients with
karyotypically normal acute myeloid leukemia: recent advances
Mrózek, Krzysztofa; Döhner, Hartmutb; Bloomfield, Clara Da
Current Opinion in Hematology: March 2007 - Volume 14 -
Issue 2 - p 106–114
doi: 10.1097/MOH.0b013e32801684c7
Myeloid disease
Purpose of review Molecular study of cytogenetically normal
acute myeloid leukemia is among the most active areas of
leukemia research. Despite having the same normal karyotype,
adults with de-novo cytogenetically normal acute myeloid
leukemia who constitute the largest cytogenetic group of acute
myeloid leukemia, are very diverse with respect to acquired
gene mutations and gene expression changes. These genetic
alterations affect clinical outcome and may assist in selection of
proper treatment. Herein we critically summarize recent
clinically relevant molecular genetic studies of cytogenetically
normal acute myeloid leukemia.
Recent findings NPM1 gene mutations causing aberrant
cytoplasmic localization of nucleophosmin have been
demonstrated to be the most frequent submicroscopic alterations
in cytogenetically normal acute myeloid leukemia and to confer
improved prognosis, especially in patients without a
concomitant FLT3 gene internal tandem duplication.
Overexpressed BAALC, ERG and MN1 genes and expression of
breast cancer resistance protein have been shown to confer poor
prognosis. A gene-expression signature previously suggested to
separate cytogenetically normal acute myeloid leukemia patients
into prognostic subgroups has been validated on a different
microarray platform, although gene-expression signature-based
classifiers predicting outcome for individual patients with
greater accuracy are still needed.
Summary The discovery of new prognostic markers has
increased our understanding of leukemogenesis and may lead to
improved prognostication and generation of novel risk-adapted
therapies.
http://www.bloodjournal.org/content/127/1/53?sso-checked=true
An update of current treatments for adult acute myeloid
leukemia
Hervé Dombret and Claude Gardin
Abstract
Recent advances in acute myeloid leukemia (AML) biology and
its genetic landscape should ultimately lead to more subset-
specific AML therapies, ideally tailored to each patient's
disease. Although a growing number of distinct AML subsets
have been increasingly characterized, patient management has
remained disappointingly uniform. If one excludes acute
promyelocytic leukemia, current AML management still relies
largely on intensive chemotherapy and allogeneic hematopoietic
stem cell transplantation (HSCT), at least in younger patients
who can tolerate such intensive treatments. Nevertheless,
progress has been made, notably in terms of standard drug dose
intensification and safer allogeneic HSCT procedures, allowing
a larger proportion of patients to achieve durable remission. In
addition, improved identification of patients at relatively low
risk of relapse should limit their undue exposure to the risks of
HSCT in first remission. The role of new effective agents, such
as purine analogs or gemtuzumab ozogamicin, is still under
investigation, whereas promising new targeted agents are under
clinical development. In contrast, minimal advances have been
made for patients unable to tolerate intensive treatment, mostly
representing older patients. The availability of hypomethylating
agents likely represents an encouraging first step for this latter
population, and it is hoped will allow for more efficient
combinations with novel agents.
J Clin Med. 2016 Mar; 5(3): 33.
Published online 2016 Mar 5. doi: 10.3390/jcm5030033
PMCID: PMC4810104
PMID: 26959069
Acute Myeloid Leukemia: A Concise Review
Jennifer N. Saultz1 and Ramiro Garzon2,*
Jennifer N. Saultz
1Medical Oncology/Hematology, Department of Internal
Medicine, Starling-Loving Hall, Room M365, 320 W. 10th
Ave., Columbus, OH 43210, USA; [email protected]
Find articles by Jennifer N. Saultz
Ramiro Garzon
2Division of Hematology, Department of Internal Medicine, 460
W 12th Ave, Columbus, OH 43210, USA
Find articles by Ramiro Garzon
Jeffrey E. Rubnitz, Academic Editor
Author informationArticle notesCopyright and License
informationDisclaimer
1Medical Oncology/Hematology, Department of Internal
Medicine, Starling-Loving Hall, Room M365, 320 W. 10th
Ave., Columbus, OH 43210, USA; [email protected]
2Division of Hematology, Department of Internal Medicine, 460
W 12th Ave, Columbus, OH 43210, USA
*Correspondence: [email protected]; Tel.: +1-614-247-2518
Received 2015 Dec 11; Accepted 2016 Feb 29.
Copyright © 2016 by the authors; licensee MDPI, Basel,
Switzerland.
This article is an open access article distributed under the terms
and conditions of the Creative Commons by Attribution (CC-
BY) license (http://creativecommons.org/licenses/by/4.0/).
This article has been cited by other articles in PMC.
Go to:
Abstract
Acute myeloid leukemia (AML) is a heterogeneous clonal
disorder characterized by immature myeloid cell proliferation
and bone marrow failure. Cytogenetics and mutation testing
remain a critical prognostic tool for post induction treatment.
Despite rapid advances in the field including new drug targets
and increased understanding of the biology, AML treatment
remains unchanged for the past three decades with the majority
of patients eventually relapsing and dying of the disease.
Allogenic transplant remains the best chance for cure for
patients with intermediate or high risk disease. In this review,
we discuss the landmark genetic studies that have improved
outcome prediction and novel therapies.
Keywords: AML, leukemia, review
Go to:
1. Introduction
Acute myeloid leukemia (AML) is a heterogeneous disorder
characterized by clonal expansion of myeloid progenitors
(blasts) in the bone marrow and peripheral blood. Previously
incurable, AML is now cured in approximately 35%–40% of
patients younger than age 60 years old [1]. For those >60 years
old, the prognosis is improving but remains grim. Recent
studies have revealed that the disorder arises from a series of
recurrent hematopoietic stem cell genetic alterations
accumulated with age. Using deep sequencing techniques on
primary and relapsed tumors, a phenomenon called clonal
evolution has been characterized with both founding clones and
novel subclones, impacting the therapeutic approach [2].
Despite an increased understanding of AML biology, our efforts
to this point in changing treatment strategy have been
disappointing. In this review, we discuss the current diagnostic
and prognostic strategies, current treatment approaches and
novel therapies critical to AML management.
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2. Morphology
Morphologically, AML blasts vary in size from slightly larger
than lymphocytes to the size of monocytes or larger. The nuclei
are large in size, varied in shape and usually contain several
nucleoli. AML blasts express antigens found also on healthy
immature myeloid cells, including common differentiation (CD)
markers CD13, CD33 and CD34 [3]. Other cells markers are
expressed depending on the morphological subtype of AML and
stage of differentiation block such as monocytic differentiation
markers (CD4, CD14, CD11b), erythroid (CD36, CD71) and
megakaryocytes markers (CD41a and CD61). On occasion, AML
blasts also co-express antigens restricted to T or B cell lineages
including Terminal deoxynucleotidyl transferase (TdT), Human
leukocyte antigen-antigen D related (HLA-DR), CD7 and CD19.
Rarely, the blasts can exhibit morphologic and immune-
phenotypic features of both myeloid and lymphoid cells that
make it difficult to classify them as either myeloid or lymphoid
in origin. These cases are classified as mixed phenotypic
leukemia and usually portend a worse overall survival [4]. Bone
marrow aspirate and biopsy, including morphology, immune-
phenotype, cytochemistry and genetics studies (conventional
karyotype and molecular studies) remain essential for diagnosis,
classification and risk stratification.
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3. Classification
Over the years there have been several different classification
systems for AML based on etiology, morphology, immune-
phenotype and genetics. In the 1970s, AML was classified
according to the French-American-British classification system
using mainly morphology and immune-phenotype/cytochemical
criteria to define eight major AML subtypes (FAB M0 to M7)
[5]. The World Health Organization (WHO) classification of
AML, replaced the old French-American-British classification
system to become the essential modality for AML classification
today. The WHO classification was updated in 2008 and
identifies seven AML subtypes: (1) AML with recurrent genetic
abnormalities (RUNX1-RUNX1T1 t(8;21)(q22;q22), CBFB-
MYH11 Inv(16)(p13.1q22), t(16;16)(p13.1;q22), PML-RARA
t(15,17)(q22;q12), MLL 11q23 abnormalities, etc.) and with
gene mutations (Nucleophosmin 1 (NPM1) and CEBPA mutated
gene); (2) AML with myelodysplasia-related changes; (3)
Therapy related myeloid neoplasms; (4) AML not otherwise
specified (NOS) (similar to FAB Classification M0–M7 with
others such as acute megakaryoblastic leukemia, acute
panmyelosis with myelofibrosis, and pure erythroleukemia); (5)
Myeloid sarcoma; (6) Myeloid proliferations related to Down
syndrome; and (7) Blastic plasmocytoid dendritic cell neoplasm
[6]. Based on etiology alone, AML can also be subdivided into
three distinct categories: (1) Secondary AML (s-AML)
(associated with antecedent myelodysplastic syndrome (MDS)
or other myeloid proliferative disorder (MPD)); (2) Therapy-
related AML (t-AML) (associated with prior
toxin/chemotherapy exposure) and (3) De novo AML [7].
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4. Cytogenetics
Non-random chromosomal abnormalities (e.g., deletions,
translocations) are identified in approximately 52% of all adult
primary AML patients and have long been recognized as the
genetic events that cause and promote this disease [8]. Certain
cytogenetic abnormalities, including the t(8;21)(q22;q22),
t(15;17)(q22;q12) and inv(16)(p13.1;q22) are associated with
longer remission and survival, while alterations of chromosomes
5, 7, complex karyotype (described as >3 chromosomal
abnormalities) and 11q23 are associated with poor response to
therapy and shorter overall survival [1]. In contrast, about 40%–
50% of all AML cases are cytogenetically normal (CN-AML)
when assessed using conventional banding analysis [9].
Although, this group has an intermediate risk of relapse, a
substantial heterogeneity is found in this population in terms of
clinical outcome. Molecular screening of this AML category is
critical for prognostic categorization and treatment strategy.
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5. Molecular Abnormalities
During the last decade, several studies have shown that the
presence or absence of specific gene mutations and/or changes
in gene expression can further classify AML cases and have an
effect on the patients’ prognosis [7,10,11]. As stated above, this
is particularly relevant for patients with CN-AML. With the
advent of next generation sequencing, the genetic landscape of
CN-AML has been more defined with each case having an
average of 13 mutations, eight of which are random “passenger”
mutations and five of which are recurrent “driver” mutations
[10]. Key molecular abnormalities have been identified and are
now used to predict outcome and help guide treatment for AML
patients. In the next sections we will describe the most relevant
AML mutations discussed in relative order of frequency.
5.1. Nucleophosmin 1 (NPM1) Mutations
Nucleophosmin 1 (NPM1) mutations are the most frequent
mutation in AML, occurring in 25%–30% of AML patients, with
female predominance [12,13]. NPM1 mutations result in the
aberrant expression of the NPM1 protein in the cytoplasm rather
than the nucleus, stimulating myeloid proliferation and
leukemia development [13,14,15]. Clinically, the mutation is
associated with monocytic morphology and in the absence of
FMS-like tyrosine kinase 3 or FLT3-ITD, predicts favorable
overall survival (OS). The reason for improved survival remains
unclear however it has been found that NPM1 mutations have
been associated with chemosensitivity to intensive
chemotherapy in both young and old patients, which may
account for improved outcome [16]. NPM1 mutations are
associated with other recurrent genetic abnormalities such as
+8, DNMT3A mutations, FLT3-ITD (40% of the time), FLT3-
TKD (10%–15%) and IDH mutations (25% of time) [11,17].
5.2. DNA Methyltansferase 3A (DNMT3A) Mutations
Mutations in the DNA methyltansferase 3A (DNMT3A) gene
occurs in 18%–22% of all AML cases and in about 34% of CN-
AML [18]. Missense mutations affecting arginine codon 882
(R882-DNMT3A) are more common than those affecting other
codons (non-R882-DNMT3A) causing a defect in normal
hematopoiesis and proper methylation [17]. Recently, DNMT3A
mutations have been identified as pre-leukemic mutations,
arising early in AML evolution and persisting in times of
remission [19]. The prognostic significance of DNMT3A
mutations is therefore thought to be adverse. Initial studies
showed unfavorable impact on outcome in CN-AML [17].
However, these effects were age related. Younger patients with
non-R882-DNMT3A mutations had shorter disease free survival
(DFS) and overall survival (OS), whereas older patients with
R882-DNMT3A mutations had shorter DFS and OS after
adjustment for other clinical and molecular prognosticators
[17]. A larger study involving more than 1700 AML cases found
no significant impact of DNMT3A mutations on survival end
points [20]. Recently, it was reported that patients with
DNMT3A-mutated AML have an inferior survival when treated
with standard-dose anthracycline induction therapy. Sehgal et
al., concluded that this group should be considered for high-
dose induction therapy [21]. High-dose daunorubicin, as
compared with standard-dose daunorubicin, improved the rate of
survival among patients with DNMT3A or NPM1 mutations or
MLL translocations (p = 0.001) but not among patients with
wild-type DNMT3A, NPM1, and MLL (p = 0.67) [22].
5.3. Fms-Like Tyrosine Kinase 3 (FLT3) Mutations
First described in 1991, FLT3 was found to be strongly
expressed in hematopoietic stem cells with important roles in
cell survival and proliferation [23,24]. Internal tandem
duplications (ITD) in the juxta-membrane (JM) domain or
mutations in the second tyrosine kinase domain (TKD) of the
FLT3 gene have been found in 20% of all AML cases and 30%
to 45% of CN-AML patients [1,25]. Both types of mutations
constitutively activate FLT3 signaling, promoting blast
proliferation [25,26]. Indeed patients with FLT3 mutations often
present with extreme leukocytosis and characteristic prominent
nuclear invagination often described as “cuplike” nucleus
[25,27]. Furthermore, FLT3-ITD mutations have been
associated with increased risk of relapse, while the prognostic
relevance of FLT3-TKD mutations is controversial [28]. The
degree to which FLT3-ITD is a biomarker associated with poor
outcome is determined by the binding site and FLT3-ITD allelic
burden [25,28,29]. Studies have shown that non-JM ITD are
worse than JM domain ITD and higher mutant to wild-type
allelic ratios were significantly associated with lower complete
remission (CR) rates [28,29]. Currently, tyrosine kinase
inhibitors (TKI) are being tested in FLT3 mutated AML
patients. Unfortunately, when used alone, TKIs showed only a
transient reduction of blasts, and even if initially effective,
subsequent acquisition of secondary mutations induces
resistance over time [30].
5.4. Isocitrate Dehydrogenase (IDH) Mutations
Mutations of the isocitrate dehydrogenase (IDH) 1 and 2 gene
are gain-of-function mutations which cause loss of the
physiologic enzyme function and create a novel ability of the
enzymes to convert α-ketoglutarate into 2-hydroxyglutarate.
IDH mutations are oncogenic. Specifically recurrent mutations
affecting the highly conserved arginine (R) residue at codon 132
(R132) of IDH1 and at codons R140 and R172 of IDH2 have
been identified in 15%–20% of all AML and 25% to 30% of
patients with CN-AML [11,22,31]. They are found more
frequently in older patients [32]. IDH mutations, in particular
IDH1, are associated with lower DFS and OS in CN-AML cases
with NPM1 mutations and wild type FLT3 [31,32]. Orally
available, selective, potent inhibitors of mutated IDH are
currently being tested in Phase I and II studies in AML with
promising results [33].
5.5. Ten–Eleven Translocation 2 (TET2) Mutations
The ten–eleven translocation oncogene family member 2 (TET2)
is found mutated in about 9%–23% of AML patients [34]. TET1
is an enzyme involved in the conversion of 5-methylcytosine
(5mC) to 5-hydroxymethylcytosine (5hmC) in DNA, which is a
process thought to play an important role in DNA demethylation
[34]. In general, TET2 mutations are loss-of-function mutations.
Overall, despite several studies their prognostic significance
remains unclear. Metzeler et al., reported TET2 mutations as an
adverse factor for CR and OS [35]. However Gaidzik et al., did
not show a prognostic effect with TET2 mutations [36].
5.6. Runt-Related Transcription Factor (RUNX1) Mutations
Runt-related transcription factor (RUNX1) has been shown to be
essential in normal hematopoiesis [37]. Also known as AML1
protein or core-binding factor subunit α-2 (CBFA2), RUNX1 is
located at chromosome 21 and is frequently translocated with
the ETO/MTG8/RUNX1T1 gene located on chromosome 8q22,
creating a fusion protein AML-ETO or t(8;21)(q22;q22) AML
[38]. In addition to chromosome translocations, RUNX1
mutations are found in 5%–13% of AML and are commonly
associated with trisomy 13, trisomy 21, absence of NPM1 and
older CN-AML [11]. In general, studies have shown RUNX1
mutations are associated with resistance to standard induction
therapy with inferior overall survival for both younger and older
patients [39].
5.7. CCAAT Enhancer Binding Protein α (CEBPA) Mutations
The differentiation-inducing transcription factor CCAAT
enhancer binding protein α (CBPA) mutations are found in 6%–
10% of all AML and 15%–19% of CN-AML, commonly in
association with del(9q) [1,40]. CEBPA is a critical
transcription factor that controls gene expression during
hematopoiesis [41]. In AML, CEBPA mutations commonly
harbor two mutations or double mutations, which frequently
involve both a combination of an N-terminal and a bZIP gene
mutation. Importantly, only bi allelic mutation, not single,
CEBPA mutations predicted a higher complete response (CR)
and favorable OS, occurring in 4%–5% of AML [42]. AML with
a single CEBPA mutation is associated with survival similar to
that of AML with wild-type CEBPA [11,43].
5.8. Additional Sex Comb-Like 1 (ASXL1) Mutations
Additional sex comb-like 1 (ASXL1) mutations are loss-of-
function mutations that occur in 5%–11% of AML cases [44].
The function of ASXL1 protein is not fully understood, but it is
suggested that it may be involved in epigenetic regulation (DNA
and/or histone modifications) [36]. ASXL1 mutations are five
times more common in older (≥60 years) patients (16.2%) than
those younger than 60 years (3.2%; p < 0.001) [44]. Among
older patients, ASXL1 mutations are associated with t(8;21),
wild-type NPM1, absence of FLT3-ITD, mutated CEBPA, and
overall inferior complete remission and overall survival [45,46].
5.9. Mixed Lineage Leukemia (MLL) Mutations
The mixed lineage leukemia (MLL) gene at chromosome 11q23
encodes for a protein that has histone methyltransferase activity
that coordinates chromatin modification as part of a regulatory
complex [47]. Translocations affecting the MLL gene lead to
aggressive acute lymphoblastic and myeloid leukemia with poor
prognosis that is characterized by HOX gene overexpression
[37]. In addition to translocations, partial in tandem
duplications (PTD) of the MLL gene (MLL-PTD) have been
demonstrated most often in adult de novo CN-AML and in
trisomy 11 AML cases [48,49]. In adult CN-AML, the frequency
of MLL rearrangement is 11% with the presence of the MLL-
PTD associated with a worse prognosis (i.e., shorter duration of
remission) when compared with CN-AML without the MLL-
PTD [50].
5.10. Tumor Protein p53 (TP53) Mutations
The tumor suppressor gene TP53 is found in 8%–14% of AML
cases. These mutations and deletions are primarily associated in
AML with complex karyotype (69%) and are rare in patient
without chromosomal deletions. In general, TP53 mutations
confer a very adverse prognosis with documented
chemoresistance [51].
5.11. c-KIT Mutations
The KIT tyrosine kinase receptor is a 145 kDa transmembrane
protein critical to normal hematopoiesis [52]. This mutation is
rare in AML (<5%) however present approximately 22%–29%
of the time in CBF mutations (i.e., AML harboring
t(8;21)(q22;q22) or inv(16)(p13.1q22) or corresponding
respective fusion genes RUNX1/RUNX1T1 and
CBFB/MYH11).KIT mutations have been shown to confer
higher relapse risk and lower OS. The KIT mutation in the
codon D816 in particular has been associated with unfavorable
DFS and OS, particularly in t(8;21)(q22;q22) patients [53].
Prospective studies later confirmed that patients with CBF AML
harboring KIT mutations have shorter OS than patients with
wild type KIT for t(8;21)(q22;q22) but not for patients with
inv(16)(p13.1q22) [54]. Remarkably KIT could be targeted
pharmacologically by using tyrosine kinase inhibitors, such as
dasatinb [52]. Preliminary results were presented recently at the
American Society of Hematology Annual Meeting from a phase
II trial that combined the KIT inhibitor, dasatinib with standard
chemotherapy for newly diagnosed patients with CBF AML.
After a median follow-up of 21 months, patients with KIT
mutations who received dasatinib with standard chemotherapy
showed similar outcomes to that of wild type KIT patients [55].
Unfortunately, no survival benefit was found with maintenance
dasatinib in a phase II study completed by Boissel et al.,
Interestingly, at relapse there was disappearance of the KIT
subclone which is hypothesized to be dasatinib driven [56].
More studies are needed to evaluate the long term outcomes of
KIT inhibitors in CBF AML.
5.12. Spilicing Factor Gene Mutations and Mutations in
Cohesion Complex Members
Often considered founding mutations, spilicing factor gene
mutations have been found to be associated with pre-leukemic
conditions such as MDS. The most common genes reported
include SF3B1, U2AF1, SRSF2 and ZRSR2 [7]. In newly
diagnosed AML patients, splicesome mutations including
SRSF2, F3B1, U2AF1, or ZRSR2 are now considered
pathognomonic of secondary AML developing from precedent
MDS [57]. Somatic cohesion complex mutations were identified
in roughly 20% of patients with high-risk MDS and secondary
AML. Relevant mutations include STAG2, TAD21 and SMC3
which are important in regulating gene expression and DNA-
loop formation. Mutations in cohesion complex members are
associated with poor overall survival [58].
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6. Prognosis/Risk Stratification
Age and performance status in addition to chromosomal and
molecular aberrations remain the most important tools for
outcome prediction in AML. In 2010, the European
LeukemiaNet (ELN) classification scheme was created in an
effort to standardize risk stratification in adult AML patients by
incorporating cytogenetic and known molecular abnormalities
[59]. Patients are classified into one of four risk groups:
favorable, intermediate 1, intermediate 2 and adverse (Table 1).
Favorable prognosis is associated with acute promyelocytic
leukemia (APL) t(15;17)(q22;q12), balanced abnormalities of
t(8;21)(q22;q22), inv(16)(p13.1q22), t(16;16)(p13.1;q22),
mutated NPM1 without FLT3-ITD and biallelic mutated
CEBPA. Intermediate 1 includes mutated NPM1 with FLT3-
ITD, wild-type NPM1 with or without FLT3-ITD. The
intermediate -2 category includes t(9;11), MLLT3-MLL and
cytogenetic abnormality neither favorable nor adverse. Complex
karyotype, inv(3)(q21q26)/t(3;3)(q21;q26), RPN1-EVI1, DEK-
NUP214 t(6,9)(p23;q34), t(6;11), −5 or del(5q), −7 or abnormal
(17p) and monosomal karyotype are associated with poor
prognosis [59,60]. Patients with monosomal karyotype (defined
as having two of more distinct monosomies or one monosomy
and another structural abnormality) have a very poor prognosis
(less than 4% survival at four years) [61]. Studies have shown
that age >60 is an independent predictor of poor outcomes
regardless of the ELN classification [60].
APL is risk stratified according to the risk of relapse based on
initial white blood count (WBC) and platelet count at diagnosis.
The following patient categories are: (1) low-risk: presenting
WBC count below or equal to 10 × 109/L and platelet count
above 40 × 109/L; (2) intermediate-risk: presenting WBC and
platelet counts below or equal to 10 × 109 and 40 × 109/L,
respectively; and (3) high-risk group: presenting WBC greater
than 10 × 109/L. Treatment strategy varies depending on risk
stratification at diagnosis however, the inclusion of arsenic
trioxide (ATO) in frontline therapy seems to benefit all-risk
category APL patients [62].
Go to:
7. Therapeutics
7.1. Induction Therapy
Since 1970, the backbone of intensive induction chemotherapy
remains unchanged. For young adults (age < 60 years) and fit
elderly patients (especially those harboring NPM1 mutations
and CBF leukemia) the intensive anthracycline and cytarabine
regimen, “7 + 3”, induction therapy is the standard of care. The
typical dose and schedule includes either daunorubicin (60 or 90
mg/m2 on days 1, 2 and 3) or idarubicin (10–12 mg/m2 on days
1, 2 and 3) given with seven days of continuous cytarabine
infusion (100 mg/m2/daily for one week (days 1 through 7). The
goal of induction chemotherapy is to achieve morphologic
complete remission (CR), which is defined as: (1) <5% blasts in
bone marrow aspirate sample with marrow spicules and with a
count of ≥200 nucleated cells (no blasts with Auer rods or
persistence of extramedullary disease); (2) absolute neutrophil
count (ANC) >1000/µL, and (3) platelets ≥ 100,000/µL [63].
Young, de novo, AML patients achieve CR in 65%–73% using
standard induction with “7 + 3” while only 38%–62% of
patients over 60 years of age with AML achieve CR [64,65,66].
Several trials have now shown that higher dose of anthracycline
(90 versus 45 mg/m2) in both younger and older fit adults (from
60 to 65) results in higher CR rates and increases the duration
of OS [65,66]. Concerns about toxicity of high-dose
daunorubicin and the wide use of the 60-mg/m2 dose as a newer
“standard,” led the United Kingdom (UK) National Cancer
Research Council (NCRC) to conduct a prospective randomized
trial with the goal to compare daunorubicin at 60 vs. 90 mg/m2
in the induction of 1206 AML patients [67]. In this study there
was no benefit of using higher dosing (90 mg/m2) over 60
mg/m2 across all subgroups [67]. However there are some
caveats to consider in this trial. In particular, the cumulative
dose of anthracyclines in the low dose arm (60 mg/m2) was
equivalent in the United Kingdom National Cancer Research
Institute (UK NCRC) trial to the higher dose (90 mg/m2) of the
other clinical trials due to multiple courses of anthracycline. In
addition the UK NCRC trial has a shorter follow up [68]. Thus,
it is clear that 45 mg/m2 of daunorubicin seems insufficient and
60 mg/m2 is not inferior to 90 mg/m2 with less associated
toxicity. Patients found to have a FLT3 mutation should be
treated with a FLT3 inhibitor (discussed in more detail below),
such as midostaurin, added to standard induction therapy [69].
Characterizing fitness in the adult population is important when
deciding treatment strategy. In particular, appropriate therapy in
the elderly AML patient should be determined based on
“patient-specific fitness” using geriatric assessments to
determine fitness, vulnerable and frail status regardless of age
[70]. In older adults, deemed not fit for intensive induction
therapy especially harboring complex karyotype without NPM1
mutations, the use of hypomethylating agents including
decitabine and azacitidine has shown to be beneficial
[70,71,72]. Both agents, commonly used to treat myelodisplasia,
have activity in AML as initial induction therapy and in the
relapsed setting. Several phase II and III studies using
azacitadine and decitabine have been conducted [71,72,73]. A
study of 82 patients with AML, median age of 72 years, who
received azacitidine as part of a compassionate use program
showed CR/incomplete CR in 11 of the 35 untreated patients
(31%). The median overall response duration was 13 months
with the one-year and two-years overall survival rates of 58%
and 24%, respectively [73]. Blum et al. showed an even higher
complete remission rate of 47% and overall response rate of
64% with 10 days of low-dose decitabine at 20 mg/m2
intravenous over 1 h [72]. This treatment was well tolerated
with CR achieved in 52% of subjects presenting with CN-AML
and in 50% of those with complex karyotypes [72]. Older
patients receiving induction decitabine usually require a median
of two to four cycles of therapy to have an optimal response.
Patients with suspected acute promyelocytic leukemia (APL)
should be treated with all-trans retinoic acid (ATRA) even
before the diagnosis is confirmed. Early use of ATRA decreases
the risk of APL induced coagulopathy, development of
disseminated intravascular coagulation (DIC) and mortality. For
patients with low-to-intermediate-risk APL (WBC ≤ 10 × 109/L)
outcomes are excellent with the use of ATRA with arsenic
(ATO) [74]. In this non-inferiority study, the ATO-ATRA
combination showed CR rates in all 77 patients (100%) and in
75 of 79 patients (95%) in the ATRA-idarubicin group. The
two-year event-free survival and OS rates were significantly
improved (97% and 99%) in the ATO-ATRA arm than for those
in the ATRA–chemotherapy arm (86% and 91%) [74]. For high-
risk patients (WBC > 10 × 109/L), chemotherapy with
idarubicin should be initiated once the diagnosis is confirmed in
addition to ATO-ATRA for rapid control of leukocytosis.
During induction treatment it is recommended that WBC,
fibrinogen level, prothrombin time and partial thromboplastin
time be monitored at least twice daily with aggressive
transfusion support (platelet count ≥ 30 × 109/L and fibrinogen
level ≥ 1.5 g/L). Prophylactic steroids are also recommended, in
particular when using ATRA/ATO combination for induction in
patients with high WBC count to prevent differentiation
syndrome [74,75].
7.2. Consolidation Strategies
Consolidation or post-induction therapy is given to prevent
relapse and eradicate minimal residual leukemia (MRD) in the
bone marrow after induction as a bridge to transplant or to
achieve cure. Assessment of minimal residual disease using
real-time PCR or Next Generation Sequencing (NGS) is
increasingly being used to help track treatment response and has
been shown to be superior than morphology alone in predicting
impending relapse [76,77]. Despite this powerful information,
the heterogentiy of AML in general has made following
mutational clones difficult to determine absolute risk of
leukemia development as some clones can persist in patient in
long-term remission following treatment, such as DNMT3A
[19]. In general, there are two main strategies for consolidation;
chemotherapy (including targeted agents) and hematopoietic
stem cell transplantation [64]. Both strategies could be used
alone or most commonly in combination depending on the type
of leukemia, the fitness of the patient and the availability of a
stem cell donor. Post induction chemotherapy using
intermediate-dose cytarabine 1.5 g/m2 twice daily on days 1, 3
and 5 given in three to four cycles is an effective and
established regimen to prolong remission and improve survival
in favorable risk young adults (<60 year of age) [8]. These
patients are usually treated with chemotherapy alone and
transplantation is reserved only at relapse [64]. In 2013, Burnett
et al. challenged this dose schedule for adults <60 year old and
showed that higher dose (3 g/m2) as compared to lower dose
(1.5 g/m2) cytarabine for three courses led to identical
outcomes [78]. Thus, low dose cytarabine at 1.5 g/m2 became
the standard of care. High-dose cytarabine is still used for
patients with CBF AML [e.g., t(8:21); or inv(16)] and NPM1
mutated AML [8,78]. In elderly patients (>60 year of age) there
was no benefit with high dose cytarabine with increased and
sometimes irreversible neurotoxicity noted [79], therefore 500–
1000 mg/m2 is standardly used [1].
For other prognostic groups, in particular fit patients with
intermediate risk or high risk disease after achieving CR,
allogeneic hematopoietic stem cell transplantation remains the
most effective long term therapy for AML with cure in 50% to
60% of patients in first CR [80,81]. Despite this, several
patients never become eligible for transplant given co-
morbidities, failure to achieve CR or lack of suitable donor
[80]. While waiting for transplant it is standard practice to give
post induction chemotherapy to maintain CR and keep the
leukemia burden low. Decisions regarding consolidation rather
than moving straight to transplant should be individualized as
consolidation therapy poses risk of morbidity and mortality,
which may hinder eventual curative transplant. Recent evidence
unanimously confirms that age should no longer be used as the
sole criteria for transplant eligibility [80,82]. Rather eligibility
should be decided upon based on pre-transplant performance
status, co-morbidities and current remission. The most widely
recognized and validated tool for assessing comorbidity
includes the Hematopoietic Cell Transplantation Comorbidity
Index (HCT-CI) [82]. The higher the comorbidity index score,
the worse the clinical outcome. Improvements in supportive
care, increased donor options (haplo-identical donors and cord
grafts) and reduced intensity preparation regimens for HCT
have increased the success of transplant in all age groups. It is
for this reason that we advocate for early patient discussion,
risk assessment and tissue typing at diagnosis. Conditioning
regimen should be decided based on patient fitness, transplant
options and disease characteristics. Although risk of relapse is
higher, long term outcomes of reduced-intensity allogeneic
hematopoietic stem cell transplant in patients who were
ineligible for myeloablative transplant are promising [81]. The
results of a prospective multicenter phase II trial conduced by
the Alliance for Clinical Trials in Oncology (formerly Cancer
and Leukemia Group B) and the Blood and Marrow Transplant
Clinical trial Network showed reduced intensity conditioning-
based hematopoietic stem cell transplant (HSCT) to be an
effective strategy for suitable older patients with an available
matched donor with a disease-free survival and OS at two years
after transplant of 42% and 48%, respectively [83]. Reduced
intensity transplants are therefore becoming more common and
clinically accepted.
7.3. Relapsed Disease
Of the patients who relapse, only a small fraction achieve
successful second remission using salvage chemotherapy
followed by allogeneic stem cell transplant with curative intent
[64]. Studies examining clonal evolution of relapse show that
relapse can occur from expansion of major or minor clones
present at diagnosis or through newly acquired mutations over
time [2]. Therefore, clinical trial is the preferred treatment
approach especially in light of novel targeted therapies. Early
relapse (occurring within the first six months after CR1)
portends a poor overall survival. Salvage regimes include
intermediate dose cytarabine (500–1500 mg/m2 intravenously
every 12 h on days 1–3); MEC (Mitoxantrone 8 mg/m2 on days
1–5, Etoposide 100 mg/m2 on days 1–5, and Cytarabine 100
mg/m2 on days 1–5) or lastly, FLAG-IDA (Fludarabine 30
mg/m2, intravenously on days 1–5 (20 mg/m2 in patient >60
years old), Cytarabine 1500 mg/m2 (500–1000 mg/m2 in
patients >60 year) intravenously, 4 h after fludarabine infusion,
on days 1–5; Idarubicin 8 mg/m2, intravenously, on days 3–5;
Granulocyte colony-stimulating factor 5 μg/kg, subcutaneously,
from day 6 to white-cell count >1 g/L (FLAG-IDA) [1]. The
likelihood of achieving a second CR is best in patients with a
long first remission, younger age and in those with favorable
cytogenetics [84]. In cases of APL, re-induction with ATO with
or without ATRA remains the standard. CR rates with single
agent ATO are good at roughly 85% [85].
Go to:
8. Novel Targets
8.1. Fms-Like Tyrosine Kinase 3 (FLT3) Inhibitors
Several FLT3 small molecule inhibitors have been developed
with mixed results. First generation drugs include multi-kinase
inhibitors such as midostaurin, lestaurtinib, tandutinib sunitinib
and sorafenib. When used as single agents they have limited
anti-leukemia activity mostly showing only transient reduction
of blood and bone marrow blasts and increased toxicity [86]. In
a randomized trial of 224 patients with FLT3 mutated AML in
first relapse lestaurtinib did not increase the response rate or
prolong survival [87]. Single agent use with midostantrum,
tandutinib and KW2449 in phase I/II trials were also not
clinically effective [88,89,90]. Combination therapy using FLT3
inhibitors with chemotherapy have also been conducted. Serve
et al. reported a randomized trial of 201 newly diagnosed older
AML patients, using the addition of sorafenib to induction and
consolidation therapy. Unfortunately, sorafenib did not improve
outcomes and patients did worse in the sorafenib arm due to
higher treatment-related mortality and lower CR rates [91]. A
recent phase II study of sorafenib in combination with 5-
azacitadine in relapsed/refractory FLT3-ITD mutant AML
demonstrated a response rate of 46%, mostly consisting of CR
or CR with incomplete count recovery [92]. Sunitinib added to
induction and consolidation chemotherapy in older patients with
AML and FLT3 activating mutations showed some effectiveness
with CR rates 53% (8/15) and 71% (5/7) for patients with FLT3-
ITD and FLT3-TKD mutations, respectively. The 13 patients
who achieved CR went on to be consolidated with high dose
cytarabine and 7/13 received sunitinib maintenance. The median
overall survival in this study was 18.8 months [93]. The largest
randomized, phase III clinical trial in FLT3-mutated AML
conduced to date was recently presented at the 2015 American
Society of Hematology (ASH) Plenary session showing the
benefit of midostaurin added to induction chemotherapy
(RATIFY trial) in which patients receiving midostaurin had
significantly longer median OS than those receiving placebo:
74.7 versus 25.6 months (p = 0.0076) [94]. Second generation
agents, promising to have better potency and less side effects
include quizartinib and crenolanib are still undergoing clinical
investigation. One trial, using quizartinib (AC220), did show
better blast count clearance however also noted the development
of secondary resistance. Drug resistance has since become the
major challenge in treating patients with a single FLT3
inhibitor. The point mutations identified which lead to
resistance include N676, F691, and D835 within the kinase
domain of FLT3-ITD [95]. The novel FLT3 inhibitors, G-749
and ASP2215 (active against both FLT3 ITD and D835
mutations), have recently been shown to provide sustained
inhibition of FLT3 phosphorylation and increased ability to
overcome drug resistance in pre-clinical trials but further
studies are needed to determine if it will have clinical efficacy
[96,97].
8.2. Isocitrate Dehydrogenase (IDH) Inhibitors
The IDH1 inhibitor AG-120 and the IDH2 inhibitor AG-221
have demonstrated promising response rates in patients with
AML in two separate phase I clinical trials [98,99]. Preliminary
results were recently presented for both trials. The objective
response rate (ORR) with AG-221 was 40% and 31% with AG-
120 in relapsed/refractory AML patients. More interestingly the
duration of the responses for AG-221 and AG-120 were more
than 15 and 11 months at the analysis, and remained ongoing.
Overall, 76% of responses lasted longer than six months. Based
on these data, the Food and Drug Administration (FDA) have
granted the medication an orphan drug designation for patients
with AML.
8.3. Nuclear Exporter Inhibitors
The anti-leukemic efficacy of reversible inhibitors of the major
nuclear export receptor, chromosome region maintenance 1
(CRM1, also termed XPO1) has brought much excitement.
CRM1 is a major nuclear exporter protein which mediates the
export and inactivation of several tumor suppressors such as
p53, p73, FOXO1, RB1 and p21 (CDKN1A) among others
[100]. CRM1 has been shown to be upregulated in a range of
solid tumors and hematological malignancies, including AML
[101,102]. Preclinical studies indicate that treatment of AML
cell lines, patient samples and AML xenografts with novel
CRM1 inhibitors (Selinexor) induces strong anti-leukemic
effects [103,104]. Based on these studies, Phase I/II clinical
trials are currently ongoing to assess the safety, tolerability and
activity of selinexor in AML patients.
8.4. Immune Therapies
Novel antibody therapies are revolutionary in the treatment
leukemia and currently under development in AML. Monoclonal
antibodies being explored include CD33 (Gemtuzumab
ozogamicin) [105] and bispecific antibodies such as AMG 330
(anti-CD33 and CD3) [106]. Chimeric antigen receptor (CAR)-
transduced T cells (CARTs) are T cells engineered to express a
specific antigen receptor target designed against a specific cell-
surface antigen. CD123 has been found to be expressed on the
majority of AML blasts but also normal hematopoietic cells.
Preclinical data shows that targeting CD123 via CARTs results
in rejection of human AML and myeloablation in the mouse
models [107].
9. Conclusions
AML is complex disease with a diverse genetic landscape. The
field is rapidly expanding with increased understanding of the
biology as well as potential new drug targets. Despite our best
efforts at targeted therapy, it has become apparent that single
drug options may be less likely to succeed over multiple drug
targets. Relapse disease remains the highest cause of mortality
after HCT. Immunotherapy is also an exciting new therapeutic
approach which may offer long term cures for relapsed patients.
We remain hopeful that the therapeutic options will continue to
improve, with less toxicity and improved efficacy.
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Articles from Journal of Clinical Medicine are provided here
courtesy of Multidisciplinary Digital Publishing
Research Problems and objectives
Ruth Ivy
Professor Bolles
HCM 402
July 27, 2019
Research Problem
A problem statement in research is a statement that describes a
current issue that needs to be addressed.
Problem statement provides the base for the research and gives
the questions to be answered by the study.
Steps to writing a research problem
Choosing an interesting topic
Doing preliminary research on the topic
Identify the target audience
Begin asking some questions
Evaluate the questions
Do the research
Research objectives
Research objectives are the guidelines on what we want to
achieve in a research.
The research objectives should be clearly stated.
In writing objectives:
You should focus on the study
You should identify the variables to be measured to be
measured
Give steps to be followed
Give the limits of your research
In writing objectives, measurable verbs should be used; for
example, create, understand, and analyze.
Research Question
A research question is a set of inquiry of what needs to be
answered in research.
Formulating a research question is the initial step in a research
project.
There are three types of research questions; descriptive,
observational-relational and casual.
To formulate a research question;
you should understand your problem.
Then ask yourself what you need to answer.
Cont..
A research question should be feasible, ethical, relevant, and
very interesting.
A question written appropriately should therefore be concise
and clear.
It should carry the purpose, the variables, and the population of
the research in it.
Research Approach
The approach to your research depends on the type of data
collected.
Research approach entails the procedures to be followed in
collecting, analyzing, and presenting data.
Depending on the type of data, research approaches are divided
into three methods;
Deductive approach
Inductive approach
Abductive approach
Reference
Kumar, R. (2019). Research methodology: A step-by-step guide
for beginners. Sage Publications Limited.
Patten, M. L. (2016). Questionnaire research: A practical guide.
Routledge.
Assignment 4: Health Services Research Proposal Synopsis
This assignment details your Health Services Research Proposal
Synopsis. ALL proposals for
any type of scholarly work must cover the 5 bold points in the
key elements below:
Section/Chapter1 contains:
1. Background and need for the work
2. Problem statement
3. Scholarly Objective, Research question (and hypotheses if
needed)
Section/Chapter 2 contains
4. Study-relevant information obtained from a review of the
literature
Section/Chapter 3 contains
5. Approach (method/design) and some information on 6-13
below
a. Study design used
b. Sample, population, participants
c. Data source, data collection instruments and procedures
d. Definitions of study variables or study dimensions of interest
e. Data analysis procedures or procedures for organizing
findings of
qualitative studies
f. Limitations
g. Results, expected findings
h. Potential significance of findings, expected conclusions,
importance of
research
In 5-6 pages using APA format, write a Research Proposal
Synopsis. Utilizing your work from
assignments 2 and 3, write a proposal synopsis which includes
all of the bold elements above and
conclude your proposal with a brief paragraph (3-4 sentences)
describing what you learned from
this assignment. Students will give a presentation on their
proposals.
When structuring your Methods section of the Research
Proposal Synopsis, use part of the
formal outline of a methods section as listed below. The section
headings for
exploratory/descriptive, case studies, and best practices papers
are in parentheses when they
differ from headings used in hypothesis testing studies.
METHODS
Study Objective(s)
Hypotheses (or Research Questions)
Approach or Study Design
Data Sources (or Population)
Specification of Variables (or Specification of Questions
[Opinions or Insights] to be
Elicited)
Data Collection or Data Set Construction (for archival data sets)
Data Analysis
In addition to the 5-6 pages, include a bibliography and
separately upload a Word document
containing all 10 of the required annotated bibliographies.
As a guide to writing your proposal synopsis, go through the
process of answering the questions
posed below. DO NOT INCLUDE THESE IN YOUR
ASSIGNMENT, this is just a process to
assist you. Use the text to help you through this process. Make
notes or write drafts as you
proceed.
1. Restate or revise/clarify the project question you identified in
Assignment 2. Based on
what you have learned, using your Problem Description and
your Literature Review,
what objective (or research questions) do you NOW want your
study to meet? (It may
have changed after your initial research).
2. What type of scholarly inquiry is your study (they each have
different formats for
writing)?
a. Is this a project aimed at informing professional practice by
integrating what is
known into a “best practices” or “new insights” document?
b. Is it an organizational case study or a consulting report?
c. Is this a prospective study where you collect qualitative data?
d. Is this a survey using a previously validated instrument?
e. Are you developing and pilot testing a survey instrument?
f. Are you analyzing archival data to describe a problem or
issues in current
practice?
g. Is your study and analysis of archival (previously collected)
data that tests a
hypotheses using inferential statistics?
h. Will you collect data prospectively and use these data to test
a hypothesis?
3. Where or from whom and how can you get the data or
information you need?
4. How will you collect those data or the information of
interest?
5. How will you measure/record the evidence?
6. Which factors may affect your findings? Can you
measure/and or control many of these
irrelevant factors?
7. For quantitative evidence, what statistical approaches will
you use to analyze your data?
For qualitative approaches, how will you organize your
responses?
8. What do you expect to find? How will you report these
findings?
Helpful Suggestion: Let your brain and notes rest for at least 24
hours, and preferably 48 hours.
Re-read your notes from the above process and start writing a 5-
6 page “Proposal Synopsis”
paper from scratch, not by copying pieces of your notes. This
will make for a more flowing and
cohesive paper.

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A sample of an annotated bibliography entry for HCM402, using the .docx

  • 1. A sample of an annotated bibliography entry for HCM402, using the guidelines on page 11, and addressing at least one bullet per section Peter Pronovost, M.D., Ph.D., Dale Needham, M.D., Ph.D., Sean Berenholtz, M.D., David Sinopoli, M.P.H., M.B.A., Haitao Chu, M.D., Ph.D., Sara Cosgrove, M.D., Bryan Sexton, Ph.D., Robert Hyzy, M.D., Robert Welsh, M.D., Gary Roth, M.D., Joseph Bander, M.D., John Kepros, M.D., and Christine Goeschel, R.N., M.P.A. An Intervention to Decrease Catheter- Related Bloodstream Infections in the ICU N Engl J Med 2006;355:2725-32. This study is closely related to the previous literature, which is cited. The review of earlier work is recent and complete as of the time this article was written. The problem statement is clear: Can catheter-related bloodstream infections occurring in the intensive care unit (ICU) be reduced using training protocols and checklists? The hypothesis is clearly stated: catheter-related bloodstream infections occurring in the intensive care unit (ICU) will be reduced using training protocols and checklists. Method: independent and dependent variables are clearly stated, and are, respectively, the intervention of training protocols/checklists, and the rates of catheter related bloodstream infections. The sample was 108 hospital ICUs in Michigan that agreed to participate in the study, and of these, 103 reported data. The analysis included 1981 ICU-months of data and 375,757 catheter-days. This sample should be representative of hospitals in other states in the United States Results and Discussion are related to the hypotheses. The median
  • 2. rate of catheter-related bloodstream infection per 1000 catheter- days decreased from 2.7 infections at baseline to 0 at 3 months after implementation of the study intervention (P≤0.002), and the mean rate per 1000 catheter- days decreased from 7.7 at baseline to 1.4 at 16 to 18 months of follow-up (P<0.002). The regression model showed a significant decrease in infection rates from baseline, with incidence-rate ratios continuously decreasing from 0.62 (95% confidence interval [CI], 0.47 to 0.81) at 0 to 3 months after implementation of the intervention to 0.34 (95% CI, 0.23 to 0.50) at 16 to 18 months. The list of references was current at the time the article was written. The report is clearly written and understandable. Running head: ACUTE MYELOID LEUKEMIA: A CONCISE REVIEW 1 ACUTE MYELOID LEUKEMIA: A CONCISE REVIEW 8Acute Myeloid Leukemia Ruth Ivy HCM 402 July 14, 2019 Acute Myeloid Leukemia The body is made up of million cells that undergo cell cycle that allows them to grow then they divide and die. For you to be able to understand the concept around this, you will need to know about cancer whereby cells grow uncontrollably. In that
  • 3. case, cells grow but they do not die like other normal cells. This occurs by first damaging the DNA of the cells. Leukemia starts in the organs that make up the blood, called the bone marrow. Acute cancer will need to be treated before they are fatal. Acute myeloid leukemia is a type of cancer that starts in the blood cells inside the bone marrow. The blood stem cells that are in the bone marrow produces new blood cells. In the production, cells will develop and make the blood-forming cells which develop to red blood cells. Lymphocytes are made from the lymphoblast; these are the ones that are supposed to die which do not happen when leukemia is involved. In the case of leukemia, the lymphocytes do not die but reproduce and crowd in the bone marrow. The high number of lymphocytes makes the organ to be unable to function normally. The blood vessel will become clogged and the movement of blood will be hindered. The symptoms will start showing from that point whereby one will have bone and joint pain as cells build up there. The cancerous cells when in the spleen and liver they will lead to abdominal swelling. When some risk factors are prevented, they can help to mitigate myeloid leukemia. The risk factors such as smoking, chemical exposure and other many can cause leukemia. Some risk cannot be controlled as one is born with. There is also a diagnosis process that needs to be understood when we look at the symptoms of the disorder. Once you get diagnosed with the disorder, then you can be tested to determine leukemia. The blood sample is the ones that are taken to take the patient through testing. On the other hand, the sample of bone marrow biopsy can also be taking and aspiration. According to the American cancer society, the bone marrow is supposed to have 20% blast for it to be diagnosed. The shortage of red blood cells and the platelets indicates the presence of leukemia. When you are doing the cells, the cytochemistry is applied where cells are dyed with a stain. The leukemia cells react with the stains. There are treatments of AML which are based on the patient.
  • 4. The main treatment is chemotherapy. You can be injected with anti-cancer pills and the doctor may insert a catheter into the vein. This is when the patient is under anesthesia. These approaches relieve the pain and chemotherapy can start. There are stages that are involved, remission induction and followed by consolidation. The drugs that are used have many side effects since they invade the dividing cells very rapidly. These affect the hair roots and that is why patients have a loss of hair. The patients always have to be on a good diet since you will be on constant medication and pills. To make sure you are strong food is very important. However, despite all the treatments and the countermeasure taken, many people succumb to leukemia. most of the death from AML are adult. The doctors are hoping to do a lot so that they can be in a position to help people. When someone is diagnosed, you will have to go through some hard and painful life. When the treatments are done then the patient can live a normal life thereafter. There is nothing that the doctors can do in preventing the gene since you are born with them. We can conclude that AML is very complex and the knowledge in biology can help us to discover new potential drugs that can help us to deal with the disorder. It is a fact that you cannot win through a single approach to the drug option. Relapse can be termed to be the highest cause of the cases of mortality after HCT. On the other hand, immunotherapy is the other approach that helps to provide a long-lasting cure for AML patients. https://www.medicalnewstoday.com/articles/323444.php https://ascopubs.org/doi/full/10.1200/JCO.2008.16.0333 https://journals.lww.com/co-
  • 5. hematology/Abstract/2007/03000/Influence_of_new_molecular_ prognostic_markers_in.5.aspx Influence of new molecular prognostic markers in patients with karyotypically normal acute myeloid leukemia: recent advances Mrózek, Krzysztofa; Döhner, Hartmutb; Bloomfield, Clara Da Current Opinion in Hematology: March 2007 - Volume 14 - Issue 2 - p 106–114 doi: 10.1097/MOH.0b013e32801684c7 Myeloid disease Purpose of review Molecular study of cytogenetically normal acute myeloid leukemia is among the most active areas of leukemia research. Despite having the same normal karyotype, adults with de-novo cytogenetically normal acute myeloid leukemia who constitute the largest cytogenetic group of acute myeloid leukemia, are very diverse with respect to acquired gene mutations and gene expression changes. These genetic alterations affect clinical outcome and may assist in selection of proper treatment. Herein we critically summarize recent clinically relevant molecular genetic studies of cytogenetically normal acute myeloid leukemia. Recent findings NPM1 gene mutations causing aberrant cytoplasmic localization of nucleophosmin have been demonstrated to be the most frequent submicroscopic alterations in cytogenetically normal acute myeloid leukemia and to confer improved prognosis, especially in patients without a concomitant FLT3 gene internal tandem duplication. Overexpressed BAALC, ERG and MN1 genes and expression of breast cancer resistance protein have been shown to confer poor prognosis. A gene-expression signature previously suggested to separate cytogenetically normal acute myeloid leukemia patients into prognostic subgroups has been validated on a different microarray platform, although gene-expression signature-based classifiers predicting outcome for individual patients with greater accuracy are still needed.
  • 6. Summary The discovery of new prognostic markers has increased our understanding of leukemogenesis and may lead to improved prognostication and generation of novel risk-adapted therapies. http://www.bloodjournal.org/content/127/1/53?sso-checked=true An update of current treatments for adult acute myeloid leukemia Hervé Dombret and Claude Gardin Abstract Recent advances in acute myeloid leukemia (AML) biology and its genetic landscape should ultimately lead to more subset- specific AML therapies, ideally tailored to each patient's disease. Although a growing number of distinct AML subsets have been increasingly characterized, patient management has remained disappointingly uniform. If one excludes acute promyelocytic leukemia, current AML management still relies largely on intensive chemotherapy and allogeneic hematopoietic stem cell transplantation (HSCT), at least in younger patients who can tolerate such intensive treatments. Nevertheless, progress has been made, notably in terms of standard drug dose intensification and safer allogeneic HSCT procedures, allowing a larger proportion of patients to achieve durable remission. In addition, improved identification of patients at relatively low risk of relapse should limit their undue exposure to the risks of HSCT in first remission. The role of new effective agents, such as purine analogs or gemtuzumab ozogamicin, is still under investigation, whereas promising new targeted agents are under clinical development. In contrast, minimal advances have been made for patients unable to tolerate intensive treatment, mostly representing older patients. The availability of hypomethylating agents likely represents an encouraging first step for this latter population, and it is hoped will allow for more efficient combinations with novel agents.
  • 7. J Clin Med. 2016 Mar; 5(3): 33. Published online 2016 Mar 5. doi: 10.3390/jcm5030033 PMCID: PMC4810104 PMID: 26959069 Acute Myeloid Leukemia: A Concise Review Jennifer N. Saultz1 and Ramiro Garzon2,* Jennifer N. Saultz 1Medical Oncology/Hematology, Department of Internal Medicine, Starling-Loving Hall, Room M365, 320 W. 10th Ave., Columbus, OH 43210, USA; [email protected] Find articles by Jennifer N. Saultz Ramiro Garzon 2Division of Hematology, Department of Internal Medicine, 460 W 12th Ave, Columbus, OH 43210, USA Find articles by Ramiro Garzon Jeffrey E. Rubnitz, Academic Editor Author informationArticle notesCopyright and License informationDisclaimer 1Medical Oncology/Hematology, Department of Internal Medicine, Starling-Loving Hall, Room M365, 320 W. 10th Ave., Columbus, OH 43210, USA; [email protected] 2Division of Hematology, Department of Internal Medicine, 460 W 12th Ave, Columbus, OH 43210, USA *Correspondence: [email protected]; Tel.: +1-614-247-2518 Received 2015 Dec 11; Accepted 2016 Feb 29. Copyright © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-
  • 8. BY) license (http://creativecommons.org/licenses/by/4.0/). This article has been cited by other articles in PMC. Go to: Abstract Acute myeloid leukemia (AML) is a heterogeneous clonal disorder characterized by immature myeloid cell proliferation and bone marrow failure. Cytogenetics and mutation testing remain a critical prognostic tool for post induction treatment. Despite rapid advances in the field including new drug targets and increased understanding of the biology, AML treatment remains unchanged for the past three decades with the majority of patients eventually relapsing and dying of the disease. Allogenic transplant remains the best chance for cure for patients with intermediate or high risk disease. In this review, we discuss the landmark genetic studies that have improved outcome prediction and novel therapies. Keywords: AML, leukemia, review Go to: 1. Introduction Acute myeloid leukemia (AML) is a heterogeneous disorder characterized by clonal expansion of myeloid progenitors (blasts) in the bone marrow and peripheral blood. Previously incurable, AML is now cured in approximately 35%–40% of patients younger than age 60 years old [1]. For those >60 years old, the prognosis is improving but remains grim. Recent studies have revealed that the disorder arises from a series of recurrent hematopoietic stem cell genetic alterations accumulated with age. Using deep sequencing techniques on primary and relapsed tumors, a phenomenon called clonal evolution has been characterized with both founding clones and novel subclones, impacting the therapeutic approach [2]. Despite an increased understanding of AML biology, our efforts to this point in changing treatment strategy have been disappointing. In this review, we discuss the current diagnostic and prognostic strategies, current treatment approaches and novel therapies critical to AML management.
  • 9. Go to: 2. Morphology Morphologically, AML blasts vary in size from slightly larger than lymphocytes to the size of monocytes or larger. The nuclei are large in size, varied in shape and usually contain several nucleoli. AML blasts express antigens found also on healthy immature myeloid cells, including common differentiation (CD) markers CD13, CD33 and CD34 [3]. Other cells markers are expressed depending on the morphological subtype of AML and stage of differentiation block such as monocytic differentiation markers (CD4, CD14, CD11b), erythroid (CD36, CD71) and megakaryocytes markers (CD41a and CD61). On occasion, AML blasts also co-express antigens restricted to T or B cell lineages including Terminal deoxynucleotidyl transferase (TdT), Human leukocyte antigen-antigen D related (HLA-DR), CD7 and CD19. Rarely, the blasts can exhibit morphologic and immune- phenotypic features of both myeloid and lymphoid cells that make it difficult to classify them as either myeloid or lymphoid in origin. These cases are classified as mixed phenotypic leukemia and usually portend a worse overall survival [4]. Bone marrow aspirate and biopsy, including morphology, immune- phenotype, cytochemistry and genetics studies (conventional karyotype and molecular studies) remain essential for diagnosis, classification and risk stratification. Go to: 3. Classification Over the years there have been several different classification systems for AML based on etiology, morphology, immune- phenotype and genetics. In the 1970s, AML was classified according to the French-American-British classification system using mainly morphology and immune-phenotype/cytochemical criteria to define eight major AML subtypes (FAB M0 to M7) [5]. The World Health Organization (WHO) classification of AML, replaced the old French-American-British classification system to become the essential modality for AML classification today. The WHO classification was updated in 2008 and
  • 10. identifies seven AML subtypes: (1) AML with recurrent genetic abnormalities (RUNX1-RUNX1T1 t(8;21)(q22;q22), CBFB- MYH11 Inv(16)(p13.1q22), t(16;16)(p13.1;q22), PML-RARA t(15,17)(q22;q12), MLL 11q23 abnormalities, etc.) and with gene mutations (Nucleophosmin 1 (NPM1) and CEBPA mutated gene); (2) AML with myelodysplasia-related changes; (3) Therapy related myeloid neoplasms; (4) AML not otherwise specified (NOS) (similar to FAB Classification M0–M7 with others such as acute megakaryoblastic leukemia, acute panmyelosis with myelofibrosis, and pure erythroleukemia); (5) Myeloid sarcoma; (6) Myeloid proliferations related to Down syndrome; and (7) Blastic plasmocytoid dendritic cell neoplasm [6]. Based on etiology alone, AML can also be subdivided into three distinct categories: (1) Secondary AML (s-AML) (associated with antecedent myelodysplastic syndrome (MDS) or other myeloid proliferative disorder (MPD)); (2) Therapy- related AML (t-AML) (associated with prior toxin/chemotherapy exposure) and (3) De novo AML [7]. Go to: 4. Cytogenetics Non-random chromosomal abnormalities (e.g., deletions, translocations) are identified in approximately 52% of all adult primary AML patients and have long been recognized as the genetic events that cause and promote this disease [8]. Certain cytogenetic abnormalities, including the t(8;21)(q22;q22), t(15;17)(q22;q12) and inv(16)(p13.1;q22) are associated with longer remission and survival, while alterations of chromosomes 5, 7, complex karyotype (described as >3 chromosomal abnormalities) and 11q23 are associated with poor response to therapy and shorter overall survival [1]. In contrast, about 40%– 50% of all AML cases are cytogenetically normal (CN-AML) when assessed using conventional banding analysis [9]. Although, this group has an intermediate risk of relapse, a substantial heterogeneity is found in this population in terms of clinical outcome. Molecular screening of this AML category is critical for prognostic categorization and treatment strategy.
  • 11. Go to: 5. Molecular Abnormalities During the last decade, several studies have shown that the presence or absence of specific gene mutations and/or changes in gene expression can further classify AML cases and have an effect on the patients’ prognosis [7,10,11]. As stated above, this is particularly relevant for patients with CN-AML. With the advent of next generation sequencing, the genetic landscape of CN-AML has been more defined with each case having an average of 13 mutations, eight of which are random “passenger” mutations and five of which are recurrent “driver” mutations [10]. Key molecular abnormalities have been identified and are now used to predict outcome and help guide treatment for AML patients. In the next sections we will describe the most relevant AML mutations discussed in relative order of frequency. 5.1. Nucleophosmin 1 (NPM1) Mutations Nucleophosmin 1 (NPM1) mutations are the most frequent mutation in AML, occurring in 25%–30% of AML patients, with female predominance [12,13]. NPM1 mutations result in the aberrant expression of the NPM1 protein in the cytoplasm rather than the nucleus, stimulating myeloid proliferation and leukemia development [13,14,15]. Clinically, the mutation is associated with monocytic morphology and in the absence of FMS-like tyrosine kinase 3 or FLT3-ITD, predicts favorable overall survival (OS). The reason for improved survival remains unclear however it has been found that NPM1 mutations have been associated with chemosensitivity to intensive chemotherapy in both young and old patients, which may account for improved outcome [16]. NPM1 mutations are associated with other recurrent genetic abnormalities such as +8, DNMT3A mutations, FLT3-ITD (40% of the time), FLT3- TKD (10%–15%) and IDH mutations (25% of time) [11,17]. 5.2. DNA Methyltansferase 3A (DNMT3A) Mutations Mutations in the DNA methyltansferase 3A (DNMT3A) gene occurs in 18%–22% of all AML cases and in about 34% of CN- AML [18]. Missense mutations affecting arginine codon 882
  • 12. (R882-DNMT3A) are more common than those affecting other codons (non-R882-DNMT3A) causing a defect in normal hematopoiesis and proper methylation [17]. Recently, DNMT3A mutations have been identified as pre-leukemic mutations, arising early in AML evolution and persisting in times of remission [19]. The prognostic significance of DNMT3A mutations is therefore thought to be adverse. Initial studies showed unfavorable impact on outcome in CN-AML [17]. However, these effects were age related. Younger patients with non-R882-DNMT3A mutations had shorter disease free survival (DFS) and overall survival (OS), whereas older patients with R882-DNMT3A mutations had shorter DFS and OS after adjustment for other clinical and molecular prognosticators [17]. A larger study involving more than 1700 AML cases found no significant impact of DNMT3A mutations on survival end points [20]. Recently, it was reported that patients with DNMT3A-mutated AML have an inferior survival when treated with standard-dose anthracycline induction therapy. Sehgal et al., concluded that this group should be considered for high- dose induction therapy [21]. High-dose daunorubicin, as compared with standard-dose daunorubicin, improved the rate of survival among patients with DNMT3A or NPM1 mutations or MLL translocations (p = 0.001) but not among patients with wild-type DNMT3A, NPM1, and MLL (p = 0.67) [22]. 5.3. Fms-Like Tyrosine Kinase 3 (FLT3) Mutations First described in 1991, FLT3 was found to be strongly expressed in hematopoietic stem cells with important roles in cell survival and proliferation [23,24]. Internal tandem duplications (ITD) in the juxta-membrane (JM) domain or mutations in the second tyrosine kinase domain (TKD) of the FLT3 gene have been found in 20% of all AML cases and 30% to 45% of CN-AML patients [1,25]. Both types of mutations constitutively activate FLT3 signaling, promoting blast proliferation [25,26]. Indeed patients with FLT3 mutations often present with extreme leukocytosis and characteristic prominent nuclear invagination often described as “cuplike” nucleus
  • 13. [25,27]. Furthermore, FLT3-ITD mutations have been associated with increased risk of relapse, while the prognostic relevance of FLT3-TKD mutations is controversial [28]. The degree to which FLT3-ITD is a biomarker associated with poor outcome is determined by the binding site and FLT3-ITD allelic burden [25,28,29]. Studies have shown that non-JM ITD are worse than JM domain ITD and higher mutant to wild-type allelic ratios were significantly associated with lower complete remission (CR) rates [28,29]. Currently, tyrosine kinase inhibitors (TKI) are being tested in FLT3 mutated AML patients. Unfortunately, when used alone, TKIs showed only a transient reduction of blasts, and even if initially effective, subsequent acquisition of secondary mutations induces resistance over time [30]. 5.4. Isocitrate Dehydrogenase (IDH) Mutations Mutations of the isocitrate dehydrogenase (IDH) 1 and 2 gene are gain-of-function mutations which cause loss of the physiologic enzyme function and create a novel ability of the enzymes to convert α-ketoglutarate into 2-hydroxyglutarate. IDH mutations are oncogenic. Specifically recurrent mutations affecting the highly conserved arginine (R) residue at codon 132 (R132) of IDH1 and at codons R140 and R172 of IDH2 have been identified in 15%–20% of all AML and 25% to 30% of patients with CN-AML [11,22,31]. They are found more frequently in older patients [32]. IDH mutations, in particular IDH1, are associated with lower DFS and OS in CN-AML cases with NPM1 mutations and wild type FLT3 [31,32]. Orally available, selective, potent inhibitors of mutated IDH are currently being tested in Phase I and II studies in AML with promising results [33]. 5.5. Ten–Eleven Translocation 2 (TET2) Mutations The ten–eleven translocation oncogene family member 2 (TET2) is found mutated in about 9%–23% of AML patients [34]. TET1 is an enzyme involved in the conversion of 5-methylcytosine (5mC) to 5-hydroxymethylcytosine (5hmC) in DNA, which is a process thought to play an important role in DNA demethylation
  • 14. [34]. In general, TET2 mutations are loss-of-function mutations. Overall, despite several studies their prognostic significance remains unclear. Metzeler et al., reported TET2 mutations as an adverse factor for CR and OS [35]. However Gaidzik et al., did not show a prognostic effect with TET2 mutations [36]. 5.6. Runt-Related Transcription Factor (RUNX1) Mutations Runt-related transcription factor (RUNX1) has been shown to be essential in normal hematopoiesis [37]. Also known as AML1 protein or core-binding factor subunit α-2 (CBFA2), RUNX1 is located at chromosome 21 and is frequently translocated with the ETO/MTG8/RUNX1T1 gene located on chromosome 8q22, creating a fusion protein AML-ETO or t(8;21)(q22;q22) AML [38]. In addition to chromosome translocations, RUNX1 mutations are found in 5%–13% of AML and are commonly associated with trisomy 13, trisomy 21, absence of NPM1 and older CN-AML [11]. In general, studies have shown RUNX1 mutations are associated with resistance to standard induction therapy with inferior overall survival for both younger and older patients [39]. 5.7. CCAAT Enhancer Binding Protein α (CEBPA) Mutations The differentiation-inducing transcription factor CCAAT enhancer binding protein α (CBPA) mutations are found in 6%– 10% of all AML and 15%–19% of CN-AML, commonly in association with del(9q) [1,40]. CEBPA is a critical transcription factor that controls gene expression during hematopoiesis [41]. In AML, CEBPA mutations commonly harbor two mutations or double mutations, which frequently involve both a combination of an N-terminal and a bZIP gene mutation. Importantly, only bi allelic mutation, not single, CEBPA mutations predicted a higher complete response (CR) and favorable OS, occurring in 4%–5% of AML [42]. AML with a single CEBPA mutation is associated with survival similar to that of AML with wild-type CEBPA [11,43]. 5.8. Additional Sex Comb-Like 1 (ASXL1) Mutations Additional sex comb-like 1 (ASXL1) mutations are loss-of- function mutations that occur in 5%–11% of AML cases [44].
  • 15. The function of ASXL1 protein is not fully understood, but it is suggested that it may be involved in epigenetic regulation (DNA and/or histone modifications) [36]. ASXL1 mutations are five times more common in older (≥60 years) patients (16.2%) than those younger than 60 years (3.2%; p < 0.001) [44]. Among older patients, ASXL1 mutations are associated with t(8;21), wild-type NPM1, absence of FLT3-ITD, mutated CEBPA, and overall inferior complete remission and overall survival [45,46]. 5.9. Mixed Lineage Leukemia (MLL) Mutations The mixed lineage leukemia (MLL) gene at chromosome 11q23 encodes for a protein that has histone methyltransferase activity that coordinates chromatin modification as part of a regulatory complex [47]. Translocations affecting the MLL gene lead to aggressive acute lymphoblastic and myeloid leukemia with poor prognosis that is characterized by HOX gene overexpression [37]. In addition to translocations, partial in tandem duplications (PTD) of the MLL gene (MLL-PTD) have been demonstrated most often in adult de novo CN-AML and in trisomy 11 AML cases [48,49]. In adult CN-AML, the frequency of MLL rearrangement is 11% with the presence of the MLL- PTD associated with a worse prognosis (i.e., shorter duration of remission) when compared with CN-AML without the MLL- PTD [50]. 5.10. Tumor Protein p53 (TP53) Mutations The tumor suppressor gene TP53 is found in 8%–14% of AML cases. These mutations and deletions are primarily associated in AML with complex karyotype (69%) and are rare in patient without chromosomal deletions. In general, TP53 mutations confer a very adverse prognosis with documented chemoresistance [51]. 5.11. c-KIT Mutations The KIT tyrosine kinase receptor is a 145 kDa transmembrane protein critical to normal hematopoiesis [52]. This mutation is rare in AML (<5%) however present approximately 22%–29% of the time in CBF mutations (i.e., AML harboring t(8;21)(q22;q22) or inv(16)(p13.1q22) or corresponding
  • 16. respective fusion genes RUNX1/RUNX1T1 and CBFB/MYH11).KIT mutations have been shown to confer higher relapse risk and lower OS. The KIT mutation in the codon D816 in particular has been associated with unfavorable DFS and OS, particularly in t(8;21)(q22;q22) patients [53]. Prospective studies later confirmed that patients with CBF AML harboring KIT mutations have shorter OS than patients with wild type KIT for t(8;21)(q22;q22) but not for patients with inv(16)(p13.1q22) [54]. Remarkably KIT could be targeted pharmacologically by using tyrosine kinase inhibitors, such as dasatinb [52]. Preliminary results were presented recently at the American Society of Hematology Annual Meeting from a phase II trial that combined the KIT inhibitor, dasatinib with standard chemotherapy for newly diagnosed patients with CBF AML. After a median follow-up of 21 months, patients with KIT mutations who received dasatinib with standard chemotherapy showed similar outcomes to that of wild type KIT patients [55]. Unfortunately, no survival benefit was found with maintenance dasatinib in a phase II study completed by Boissel et al., Interestingly, at relapse there was disappearance of the KIT subclone which is hypothesized to be dasatinib driven [56]. More studies are needed to evaluate the long term outcomes of KIT inhibitors in CBF AML. 5.12. Spilicing Factor Gene Mutations and Mutations in Cohesion Complex Members Often considered founding mutations, spilicing factor gene mutations have been found to be associated with pre-leukemic conditions such as MDS. The most common genes reported include SF3B1, U2AF1, SRSF2 and ZRSR2 [7]. In newly diagnosed AML patients, splicesome mutations including SRSF2, F3B1, U2AF1, or ZRSR2 are now considered pathognomonic of secondary AML developing from precedent MDS [57]. Somatic cohesion complex mutations were identified in roughly 20% of patients with high-risk MDS and secondary AML. Relevant mutations include STAG2, TAD21 and SMC3 which are important in regulating gene expression and DNA-
  • 17. loop formation. Mutations in cohesion complex members are associated with poor overall survival [58]. Go to: 6. Prognosis/Risk Stratification Age and performance status in addition to chromosomal and molecular aberrations remain the most important tools for outcome prediction in AML. In 2010, the European LeukemiaNet (ELN) classification scheme was created in an effort to standardize risk stratification in adult AML patients by incorporating cytogenetic and known molecular abnormalities [59]. Patients are classified into one of four risk groups: favorable, intermediate 1, intermediate 2 and adverse (Table 1). Favorable prognosis is associated with acute promyelocytic leukemia (APL) t(15;17)(q22;q12), balanced abnormalities of t(8;21)(q22;q22), inv(16)(p13.1q22), t(16;16)(p13.1;q22), mutated NPM1 without FLT3-ITD and biallelic mutated CEBPA. Intermediate 1 includes mutated NPM1 with FLT3- ITD, wild-type NPM1 with or without FLT3-ITD. The intermediate -2 category includes t(9;11), MLLT3-MLL and cytogenetic abnormality neither favorable nor adverse. Complex karyotype, inv(3)(q21q26)/t(3;3)(q21;q26), RPN1-EVI1, DEK- NUP214 t(6,9)(p23;q34), t(6;11), −5 or del(5q), −7 or abnormal (17p) and monosomal karyotype are associated with poor prognosis [59,60]. Patients with monosomal karyotype (defined as having two of more distinct monosomies or one monosomy and another structural abnormality) have a very poor prognosis (less than 4% survival at four years) [61]. Studies have shown that age >60 is an independent predictor of poor outcomes regardless of the ELN classification [60]. APL is risk stratified according to the risk of relapse based on initial white blood count (WBC) and platelet count at diagnosis. The following patient categories are: (1) low-risk: presenting WBC count below or equal to 10 × 109/L and platelet count above 40 × 109/L; (2) intermediate-risk: presenting WBC and platelet counts below or equal to 10 × 109 and 40 × 109/L, respectively; and (3) high-risk group: presenting WBC greater
  • 18. than 10 × 109/L. Treatment strategy varies depending on risk stratification at diagnosis however, the inclusion of arsenic trioxide (ATO) in frontline therapy seems to benefit all-risk category APL patients [62]. Go to: 7. Therapeutics 7.1. Induction Therapy Since 1970, the backbone of intensive induction chemotherapy remains unchanged. For young adults (age < 60 years) and fit elderly patients (especially those harboring NPM1 mutations and CBF leukemia) the intensive anthracycline and cytarabine regimen, “7 + 3”, induction therapy is the standard of care. The typical dose and schedule includes either daunorubicin (60 or 90 mg/m2 on days 1, 2 and 3) or idarubicin (10–12 mg/m2 on days 1, 2 and 3) given with seven days of continuous cytarabine infusion (100 mg/m2/daily for one week (days 1 through 7). The goal of induction chemotherapy is to achieve morphologic complete remission (CR), which is defined as: (1) <5% blasts in bone marrow aspirate sample with marrow spicules and with a count of ≥200 nucleated cells (no blasts with Auer rods or persistence of extramedullary disease); (2) absolute neutrophil count (ANC) >1000/µL, and (3) platelets ≥ 100,000/µL [63]. Young, de novo, AML patients achieve CR in 65%–73% using standard induction with “7 + 3” while only 38%–62% of patients over 60 years of age with AML achieve CR [64,65,66]. Several trials have now shown that higher dose of anthracycline (90 versus 45 mg/m2) in both younger and older fit adults (from 60 to 65) results in higher CR rates and increases the duration of OS [65,66]. Concerns about toxicity of high-dose daunorubicin and the wide use of the 60-mg/m2 dose as a newer “standard,” led the United Kingdom (UK) National Cancer Research Council (NCRC) to conduct a prospective randomized trial with the goal to compare daunorubicin at 60 vs. 90 mg/m2 in the induction of 1206 AML patients [67]. In this study there was no benefit of using higher dosing (90 mg/m2) over 60 mg/m2 across all subgroups [67]. However there are some
  • 19. caveats to consider in this trial. In particular, the cumulative dose of anthracyclines in the low dose arm (60 mg/m2) was equivalent in the United Kingdom National Cancer Research Institute (UK NCRC) trial to the higher dose (90 mg/m2) of the other clinical trials due to multiple courses of anthracycline. In addition the UK NCRC trial has a shorter follow up [68]. Thus, it is clear that 45 mg/m2 of daunorubicin seems insufficient and 60 mg/m2 is not inferior to 90 mg/m2 with less associated toxicity. Patients found to have a FLT3 mutation should be treated with a FLT3 inhibitor (discussed in more detail below), such as midostaurin, added to standard induction therapy [69]. Characterizing fitness in the adult population is important when deciding treatment strategy. In particular, appropriate therapy in the elderly AML patient should be determined based on “patient-specific fitness” using geriatric assessments to determine fitness, vulnerable and frail status regardless of age [70]. In older adults, deemed not fit for intensive induction therapy especially harboring complex karyotype without NPM1 mutations, the use of hypomethylating agents including decitabine and azacitidine has shown to be beneficial [70,71,72]. Both agents, commonly used to treat myelodisplasia, have activity in AML as initial induction therapy and in the relapsed setting. Several phase II and III studies using azacitadine and decitabine have been conducted [71,72,73]. A study of 82 patients with AML, median age of 72 years, who received azacitidine as part of a compassionate use program showed CR/incomplete CR in 11 of the 35 untreated patients (31%). The median overall response duration was 13 months with the one-year and two-years overall survival rates of 58% and 24%, respectively [73]. Blum et al. showed an even higher complete remission rate of 47% and overall response rate of 64% with 10 days of low-dose decitabine at 20 mg/m2 intravenous over 1 h [72]. This treatment was well tolerated with CR achieved in 52% of subjects presenting with CN-AML and in 50% of those with complex karyotypes [72]. Older patients receiving induction decitabine usually require a median
  • 20. of two to four cycles of therapy to have an optimal response. Patients with suspected acute promyelocytic leukemia (APL) should be treated with all-trans retinoic acid (ATRA) even before the diagnosis is confirmed. Early use of ATRA decreases the risk of APL induced coagulopathy, development of disseminated intravascular coagulation (DIC) and mortality. For patients with low-to-intermediate-risk APL (WBC ≤ 10 × 109/L) outcomes are excellent with the use of ATRA with arsenic (ATO) [74]. In this non-inferiority study, the ATO-ATRA combination showed CR rates in all 77 patients (100%) and in 75 of 79 patients (95%) in the ATRA-idarubicin group. The two-year event-free survival and OS rates were significantly improved (97% and 99%) in the ATO-ATRA arm than for those in the ATRA–chemotherapy arm (86% and 91%) [74]. For high- risk patients (WBC > 10 × 109/L), chemotherapy with idarubicin should be initiated once the diagnosis is confirmed in addition to ATO-ATRA for rapid control of leukocytosis. During induction treatment it is recommended that WBC, fibrinogen level, prothrombin time and partial thromboplastin time be monitored at least twice daily with aggressive transfusion support (platelet count ≥ 30 × 109/L and fibrinogen level ≥ 1.5 g/L). Prophylactic steroids are also recommended, in particular when using ATRA/ATO combination for induction in patients with high WBC count to prevent differentiation syndrome [74,75]. 7.2. Consolidation Strategies Consolidation or post-induction therapy is given to prevent relapse and eradicate minimal residual leukemia (MRD) in the bone marrow after induction as a bridge to transplant or to achieve cure. Assessment of minimal residual disease using real-time PCR or Next Generation Sequencing (NGS) is increasingly being used to help track treatment response and has been shown to be superior than morphology alone in predicting impending relapse [76,77]. Despite this powerful information, the heterogentiy of AML in general has made following mutational clones difficult to determine absolute risk of
  • 21. leukemia development as some clones can persist in patient in long-term remission following treatment, such as DNMT3A [19]. In general, there are two main strategies for consolidation; chemotherapy (including targeted agents) and hematopoietic stem cell transplantation [64]. Both strategies could be used alone or most commonly in combination depending on the type of leukemia, the fitness of the patient and the availability of a stem cell donor. Post induction chemotherapy using intermediate-dose cytarabine 1.5 g/m2 twice daily on days 1, 3 and 5 given in three to four cycles is an effective and established regimen to prolong remission and improve survival in favorable risk young adults (<60 year of age) [8]. These patients are usually treated with chemotherapy alone and transplantation is reserved only at relapse [64]. In 2013, Burnett et al. challenged this dose schedule for adults <60 year old and showed that higher dose (3 g/m2) as compared to lower dose (1.5 g/m2) cytarabine for three courses led to identical outcomes [78]. Thus, low dose cytarabine at 1.5 g/m2 became the standard of care. High-dose cytarabine is still used for patients with CBF AML [e.g., t(8:21); or inv(16)] and NPM1 mutated AML [8,78]. In elderly patients (>60 year of age) there was no benefit with high dose cytarabine with increased and sometimes irreversible neurotoxicity noted [79], therefore 500– 1000 mg/m2 is standardly used [1]. For other prognostic groups, in particular fit patients with intermediate risk or high risk disease after achieving CR, allogeneic hematopoietic stem cell transplantation remains the most effective long term therapy for AML with cure in 50% to 60% of patients in first CR [80,81]. Despite this, several patients never become eligible for transplant given co- morbidities, failure to achieve CR or lack of suitable donor [80]. While waiting for transplant it is standard practice to give post induction chemotherapy to maintain CR and keep the leukemia burden low. Decisions regarding consolidation rather than moving straight to transplant should be individualized as consolidation therapy poses risk of morbidity and mortality,
  • 22. which may hinder eventual curative transplant. Recent evidence unanimously confirms that age should no longer be used as the sole criteria for transplant eligibility [80,82]. Rather eligibility should be decided upon based on pre-transplant performance status, co-morbidities and current remission. The most widely recognized and validated tool for assessing comorbidity includes the Hematopoietic Cell Transplantation Comorbidity Index (HCT-CI) [82]. The higher the comorbidity index score, the worse the clinical outcome. Improvements in supportive care, increased donor options (haplo-identical donors and cord grafts) and reduced intensity preparation regimens for HCT have increased the success of transplant in all age groups. It is for this reason that we advocate for early patient discussion, risk assessment and tissue typing at diagnosis. Conditioning regimen should be decided based on patient fitness, transplant options and disease characteristics. Although risk of relapse is higher, long term outcomes of reduced-intensity allogeneic hematopoietic stem cell transplant in patients who were ineligible for myeloablative transplant are promising [81]. The results of a prospective multicenter phase II trial conduced by the Alliance for Clinical Trials in Oncology (formerly Cancer and Leukemia Group B) and the Blood and Marrow Transplant Clinical trial Network showed reduced intensity conditioning- based hematopoietic stem cell transplant (HSCT) to be an effective strategy for suitable older patients with an available matched donor with a disease-free survival and OS at two years after transplant of 42% and 48%, respectively [83]. Reduced intensity transplants are therefore becoming more common and clinically accepted. 7.3. Relapsed Disease Of the patients who relapse, only a small fraction achieve successful second remission using salvage chemotherapy followed by allogeneic stem cell transplant with curative intent [64]. Studies examining clonal evolution of relapse show that relapse can occur from expansion of major or minor clones present at diagnosis or through newly acquired mutations over
  • 23. time [2]. Therefore, clinical trial is the preferred treatment approach especially in light of novel targeted therapies. Early relapse (occurring within the first six months after CR1) portends a poor overall survival. Salvage regimes include intermediate dose cytarabine (500–1500 mg/m2 intravenously every 12 h on days 1–3); MEC (Mitoxantrone 8 mg/m2 on days 1–5, Etoposide 100 mg/m2 on days 1–5, and Cytarabine 100 mg/m2 on days 1–5) or lastly, FLAG-IDA (Fludarabine 30 mg/m2, intravenously on days 1–5 (20 mg/m2 in patient >60 years old), Cytarabine 1500 mg/m2 (500–1000 mg/m2 in patients >60 year) intravenously, 4 h after fludarabine infusion, on days 1–5; Idarubicin 8 mg/m2, intravenously, on days 3–5; Granulocyte colony-stimulating factor 5 μg/kg, subcutaneously, from day 6 to white-cell count >1 g/L (FLAG-IDA) [1]. The likelihood of achieving a second CR is best in patients with a long first remission, younger age and in those with favorable cytogenetics [84]. In cases of APL, re-induction with ATO with or without ATRA remains the standard. CR rates with single agent ATO are good at roughly 85% [85]. Go to: 8. Novel Targets 8.1. Fms-Like Tyrosine Kinase 3 (FLT3) Inhibitors Several FLT3 small molecule inhibitors have been developed with mixed results. First generation drugs include multi-kinase inhibitors such as midostaurin, lestaurtinib, tandutinib sunitinib and sorafenib. When used as single agents they have limited anti-leukemia activity mostly showing only transient reduction of blood and bone marrow blasts and increased toxicity [86]. In a randomized trial of 224 patients with FLT3 mutated AML in first relapse lestaurtinib did not increase the response rate or prolong survival [87]. Single agent use with midostantrum, tandutinib and KW2449 in phase I/II trials were also not clinically effective [88,89,90]. Combination therapy using FLT3 inhibitors with chemotherapy have also been conducted. Serve et al. reported a randomized trial of 201 newly diagnosed older AML patients, using the addition of sorafenib to induction and
  • 24. consolidation therapy. Unfortunately, sorafenib did not improve outcomes and patients did worse in the sorafenib arm due to higher treatment-related mortality and lower CR rates [91]. A recent phase II study of sorafenib in combination with 5- azacitadine in relapsed/refractory FLT3-ITD mutant AML demonstrated a response rate of 46%, mostly consisting of CR or CR with incomplete count recovery [92]. Sunitinib added to induction and consolidation chemotherapy in older patients with AML and FLT3 activating mutations showed some effectiveness with CR rates 53% (8/15) and 71% (5/7) for patients with FLT3- ITD and FLT3-TKD mutations, respectively. The 13 patients who achieved CR went on to be consolidated with high dose cytarabine and 7/13 received sunitinib maintenance. The median overall survival in this study was 18.8 months [93]. The largest randomized, phase III clinical trial in FLT3-mutated AML conduced to date was recently presented at the 2015 American Society of Hematology (ASH) Plenary session showing the benefit of midostaurin added to induction chemotherapy (RATIFY trial) in which patients receiving midostaurin had significantly longer median OS than those receiving placebo: 74.7 versus 25.6 months (p = 0.0076) [94]. Second generation agents, promising to have better potency and less side effects include quizartinib and crenolanib are still undergoing clinical investigation. One trial, using quizartinib (AC220), did show better blast count clearance however also noted the development of secondary resistance. Drug resistance has since become the major challenge in treating patients with a single FLT3 inhibitor. The point mutations identified which lead to resistance include N676, F691, and D835 within the kinase domain of FLT3-ITD [95]. The novel FLT3 inhibitors, G-749 and ASP2215 (active against both FLT3 ITD and D835 mutations), have recently been shown to provide sustained inhibition of FLT3 phosphorylation and increased ability to overcome drug resistance in pre-clinical trials but further studies are needed to determine if it will have clinical efficacy [96,97].
  • 25. 8.2. Isocitrate Dehydrogenase (IDH) Inhibitors The IDH1 inhibitor AG-120 and the IDH2 inhibitor AG-221 have demonstrated promising response rates in patients with AML in two separate phase I clinical trials [98,99]. Preliminary results were recently presented for both trials. The objective response rate (ORR) with AG-221 was 40% and 31% with AG- 120 in relapsed/refractory AML patients. More interestingly the duration of the responses for AG-221 and AG-120 were more than 15 and 11 months at the analysis, and remained ongoing. Overall, 76% of responses lasted longer than six months. Based on these data, the Food and Drug Administration (FDA) have granted the medication an orphan drug designation for patients with AML. 8.3. Nuclear Exporter Inhibitors The anti-leukemic efficacy of reversible inhibitors of the major nuclear export receptor, chromosome region maintenance 1 (CRM1, also termed XPO1) has brought much excitement. CRM1 is a major nuclear exporter protein which mediates the export and inactivation of several tumor suppressors such as p53, p73, FOXO1, RB1 and p21 (CDKN1A) among others [100]. CRM1 has been shown to be upregulated in a range of solid tumors and hematological malignancies, including AML [101,102]. Preclinical studies indicate that treatment of AML cell lines, patient samples and AML xenografts with novel CRM1 inhibitors (Selinexor) induces strong anti-leukemic effects [103,104]. Based on these studies, Phase I/II clinical trials are currently ongoing to assess the safety, tolerability and activity of selinexor in AML patients. 8.4. Immune Therapies Novel antibody therapies are revolutionary in the treatment leukemia and currently under development in AML. Monoclonal antibodies being explored include CD33 (Gemtuzumab ozogamicin) [105] and bispecific antibodies such as AMG 330 (anti-CD33 and CD3) [106]. Chimeric antigen receptor (CAR)- transduced T cells (CARTs) are T cells engineered to express a specific antigen receptor target designed against a specific cell-
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  • 45. courtesy of Multidisciplinary Digital Publishing Research Problems and objectives Ruth Ivy Professor Bolles HCM 402 July 27, 2019 Research Problem A problem statement in research is a statement that describes a current issue that needs to be addressed. Problem statement provides the base for the research and gives the questions to be answered by the study. Steps to writing a research problem Choosing an interesting topic Doing preliminary research on the topic Identify the target audience Begin asking some questions Evaluate the questions Do the research Research objectives Research objectives are the guidelines on what we want to achieve in a research. The research objectives should be clearly stated. In writing objectives: You should focus on the study You should identify the variables to be measured to be measured Give steps to be followed Give the limits of your research In writing objectives, measurable verbs should be used; for example, create, understand, and analyze.
  • 46. Research Question A research question is a set of inquiry of what needs to be answered in research. Formulating a research question is the initial step in a research project. There are three types of research questions; descriptive, observational-relational and casual. To formulate a research question; you should understand your problem. Then ask yourself what you need to answer. Cont.. A research question should be feasible, ethical, relevant, and very interesting. A question written appropriately should therefore be concise and clear. It should carry the purpose, the variables, and the population of the research in it. Research Approach The approach to your research depends on the type of data collected. Research approach entails the procedures to be followed in collecting, analyzing, and presenting data. Depending on the type of data, research approaches are divided into three methods; Deductive approach Inductive approach Abductive approach Reference
  • 47. Kumar, R. (2019). Research methodology: A step-by-step guide for beginners. Sage Publications Limited. Patten, M. L. (2016). Questionnaire research: A practical guide. Routledge. Assignment 4: Health Services Research Proposal Synopsis This assignment details your Health Services Research Proposal Synopsis. ALL proposals for any type of scholarly work must cover the 5 bold points in the key elements below: Section/Chapter1 contains: 1. Background and need for the work 2. Problem statement 3. Scholarly Objective, Research question (and hypotheses if needed) Section/Chapter 2 contains 4. Study-relevant information obtained from a review of the literature Section/Chapter 3 contains 5. Approach (method/design) and some information on 6-13 below a. Study design used
  • 48. b. Sample, population, participants c. Data source, data collection instruments and procedures d. Definitions of study variables or study dimensions of interest e. Data analysis procedures or procedures for organizing findings of qualitative studies f. Limitations g. Results, expected findings h. Potential significance of findings, expected conclusions, importance of research In 5-6 pages using APA format, write a Research Proposal Synopsis. Utilizing your work from assignments 2 and 3, write a proposal synopsis which includes all of the bold elements above and conclude your proposal with a brief paragraph (3-4 sentences) describing what you learned from this assignment. Students will give a presentation on their proposals. When structuring your Methods section of the Research Proposal Synopsis, use part of the formal outline of a methods section as listed below. The section headings for exploratory/descriptive, case studies, and best practices papers are in parentheses when they differ from headings used in hypothesis testing studies.
  • 49. METHODS Study Objective(s) Hypotheses (or Research Questions) Approach or Study Design Data Sources (or Population) Specification of Variables (or Specification of Questions [Opinions or Insights] to be Elicited) Data Collection or Data Set Construction (for archival data sets) Data Analysis In addition to the 5-6 pages, include a bibliography and separately upload a Word document containing all 10 of the required annotated bibliographies. As a guide to writing your proposal synopsis, go through the process of answering the questions posed below. DO NOT INCLUDE THESE IN YOUR ASSIGNMENT, this is just a process to assist you. Use the text to help you through this process. Make notes or write drafts as you proceed.
  • 50. 1. Restate or revise/clarify the project question you identified in Assignment 2. Based on what you have learned, using your Problem Description and your Literature Review, what objective (or research questions) do you NOW want your study to meet? (It may have changed after your initial research). 2. What type of scholarly inquiry is your study (they each have different formats for writing)? a. Is this a project aimed at informing professional practice by integrating what is known into a “best practices” or “new insights” document? b. Is it an organizational case study or a consulting report? c. Is this a prospective study where you collect qualitative data? d. Is this a survey using a previously validated instrument? e. Are you developing and pilot testing a survey instrument? f. Are you analyzing archival data to describe a problem or issues in current practice? g. Is your study and analysis of archival (previously collected) data that tests a hypotheses using inferential statistics? h. Will you collect data prospectively and use these data to test a hypothesis? 3. Where or from whom and how can you get the data or information you need? 4. How will you collect those data or the information of interest? 5. How will you measure/record the evidence?
  • 51. 6. Which factors may affect your findings? Can you measure/and or control many of these irrelevant factors? 7. For quantitative evidence, what statistical approaches will you use to analyze your data? For qualitative approaches, how will you organize your responses? 8. What do you expect to find? How will you report these findings? Helpful Suggestion: Let your brain and notes rest for at least 24 hours, and preferably 48 hours. Re-read your notes from the above process and start writing a 5- 6 page “Proposal Synopsis” paper from scratch, not by copying pieces of your notes. This will make for a more flowing and cohesive paper.